Question 1
Using GeoGebra, illustrate Pappus's Theorem by plotting:
- two lines ℓ1,ℓ2,
- three points A, B, C on ℓ1 and A', B', C' on ℓ2,
- cross-lines defined by AB', AC', BA', BC', CA', and CB'.
- the "Pappus Line" connecting the intersections of the cross-lines. Be sure that you can move around the points A, B, C, A', B', C' so that the Pappus line still connects the intersections.